[jira] [Updated] (DERBY-4415) Make it easy to plug custom AST printers into the compiler

["Rick Hillegas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-4415?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rick Hillegas updated DERBY-4415:
---------------------------------

    Attachment: ASTInspector.java

Attaching a new version of the ASTInspector. This version was tweaked to function as a custom, optional tool. If other people find this tool to be useful, we could productize it and document it. To load and unload the XmlASTPrinter, you now do the following:

  call syscs_util.syscs_register_tool( 'customTool', true, 'ASTInspector', 'XmlASTPrinter' );
  call syscs_util.syscs_register_tool( 'customTool', false, 'ASTInspector' );

Here's a little script which shows how to use this tool:

connect 'jdbc:derby:memory:dummy;create=true';

create table t( a int );

call syscs_util.syscs_register_tool( 'customTool', true, 'ASTInspector', 'XmlASTPrinter' );

select * from t;

call syscs_util.syscs_register_tool( 'customTool', false, 'ASTInspector' );

-- now look for the output in derbyAST.xml



                
> Make it easy to plug custom AST printers into the compiler
> ----------------------------------------------------------
>
>                 Key: DERBY-4415
>                 URL: https://issues.apache.org/jira/browse/DERBY-4415
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>            Priority: Minor
>             Fix For: 10.6.1.0
>
>         Attachments: ASTInspector.java, ASTInspector.java, ASTInspector.java, derby-4415-01-aa-customASTprinters.diff, derby-4415-01-ab-customASTprinters.diff, XmlASTPrinter.java, XmlASTPrinter.java, XmlASTPrinter.java, XmlASTPrinter.java
>
>
> It would be nice to be able to tell the compiler to use user-written formatters for pretty-printing Derby's abstract syntax trees. For instance, it would be nice to be able to plug in the AST printers attached to DERBY-791, including the Eclipse-based tree grapher written by Kay Röpke.

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